Device for twisting a warp band and method



July 11, 1 967 G. STAUBU 3,330,017

DEVICE FOR TWISTING A WARP BAND AND METHOD Filed July 16, 1965 4 Sheets-Sheet 1 PRIOR ART Fig-2.

PRIOR ART IN VENTOR H U5 STHUBL/ July 11, 1967 STAUBU 3,330,017

DEVICE FOR TWISTING A WARP BAND AND METHOD Filed July 16, 1965 4 Sheets-Sheet 2 GHLLUS STHL/BL! MW M W INVENTUR July 11, 1967 G. STAUBLI 3,330,017

DEVICE FOR TWISTING A WARP BAND AND METHOD Filed July 16, 1965 4 Sheets-Sheet 3 INVENTOR GHLLUS STH BLI July 11, 1967 G. STAUBLI DEVICE FOR TWISTING A WARP BAND AND METHOD 4 Sheets-Sheet 4.

Filed July 16, 1965 INVENTOR smu STHUBU United States Patent DEVICE FOR TWISTING A WARP BAND AND METHOD Gallus Staubli, St. Gall, Switzerland, assignor to Maschinenfabrik Benuinger AG, Uzwil, Switzerland Filed July 16, 1965, Ser. No. 472,488 Claims priority, application Switzerland, July 22, 1964, 9,591/ 64 6 Claims. (Cl. 2854) This invention relates in general to a weaving device and a method for twisting a warp band, and in particular to a new and useful device and method for twisting a warp band dotted from a beaming creel and to be wound on a warping frame.

For producing a warp by means of a warping frame, it is known to dofi threads from bobbins on a bobbin table or beaming creel and, in a number corresponding to the density desired for the band width, wind up these threads band-like into a so-called warp band in the full length desired for the warp onto the cylinder of a warping frame.

On this warping frame, several such warp bands of warp length are wound up successively side by side in full set of the desired warp. These bands placed side by side on the warp cylinder are then all simultaneously rewound on a warp beam to form the final warp. Each layer of the warp beam thus obtained therefore consists of parts of several warp bands originally wound up successively on the warping frame, which will later on the loom form the warp threads of the fabric.

By creeling bobbins on the beaming creel with threads differing in color, thickness and kind and by correspondingly arranged dofiing of the threads of these bobbins, first the warp band and, through it, the warp to be produced can be given a predetermined structure in respect to material, color and design.

As is known, the repeats of a number of fabrics, in particular, for example, handkerchiefs, table cloth, towels, dish towels, have a symmetrical warp structure. In order to be able to warp this warp structure immediately, without the necessity of drawing in the threads each time, between warp bands to be wound up successively side by side, it is known to give the Warp band a width reaching from design border to axis of symmetry. After the winding of such a warp band on the warp cylinder by turning the entire band byv 180, the so-called twisting of the band, the threads of the band are brought into the right position in order to wind the following band with symmetrical design beside the first band.

According to the usual method of warping, the threads defied from the bobbins are creeled in the beaming creel, and after passing a yarn brake and a thread regulator which controls its presence, are guided through a cross, in which they are combined to an approximately plane field whose transverse extension is about parallel to the axis of the warp cylinder. Between this cross reed and the warp cylinder this field passes the lease rods serving to form the lease for laying in the cross and straight cords and finally a warping reed in which the field of threads is brought to the desired width and density of the warp band to be wound up.

So far this twisting of the warp band was accomplished by turning the warping reed in its plane by 180", while the remaining draft, in particular the cross reed, was left in its position. As a result, in the narrow space between cross reed and warping reed an extremely unpleasant tendency to thread breakage developed in that practically all threads crossed in one point. The threads charging or passing through the cross reed at the right after the twist were led to the left edge or border of the warping reed,

3,330,017 Patented July 11, 1967 while the threads running through the left side of the cross reed passed through the warping reed at the right.

The constant friction of threads at the crossing point frequently causes damage or breakage of threads, the latter being particularly unpleasant at this place, near the warping cylinder, because the great mass of the warping cylinder can hardly be braked fast enough to prevent winding up the broken thread end. In any event, it was not possible to maintain the same warping speed with a twisted warping band as with a normally drawn warping band.

These disadvantages have been overcome in the method of the present invention for twisting a warp band which has been dotted from a beaming creel, combined to a field of threads, and, through a cross reed and a warping reed, wound up on the cylinder of a warping frame. In accordance with invention the threads dotfed from the creel are combined, between creel and cross reed, to an areal field of threads, whose width extends in at least approximately rectangular direction to that of the width which is forced upon the field by the cross reed. In order to twist the band the cross reed and warping reed are turned in their planes by 180 in the same sense of direction, i.e. in that direction where between the two end positions the reversal of threads between creel and cross reed is eliminated.

Thus, first of all, the reorientation of the individual threads in the twist is effected over a substantially longer distance than was the rule before, namely, between creel and cross reel. Furthermore, the inventive method achieves that in neither position of the warp band, i.e. not in the Warping of the band in normal position nor in the warping of the twisted band, do the threads cross at any location. Moreover, in both positions the warping is subject to exactly the same working conditions, friction condi-. tions, degree of deflection, etc.

The device for carrying out this method, which is also a subject of this invention, is characterized by the fact that cross reed and warping reed with threads passing through are arranged in planes 180 apart. Between creel and cross reed, guide means for the threads dotted from the creel are arranged which guide the cone of threads coming from the creel so that they become an areal field of threads whose width, with the same succession of threads, extends at least approximately rectangular to the extension of width of the field of threads in the cross reed.

In a preferred embodiment of this device, the aforementioned guide means consist of a guide reed, through which the threads pass in the same lateral succession as the cross reed, but which in relation to the end positions of the latter is arranged in a plane away, i.e. preferably at such height that the center threads of the field of threads in the guide reed are on the level of the field of threads in the cross reed.

Accordingly it is an object of the invention to provide a method for twisting a warp band by directing dotted threads into an areal field of threads having an extension of width approximately vertical to the direction to the extension of width forced upon the field by the cross reed and wherein the cross reed and the warping reed are rotated in their mounting plane which plane is advantageously in a location between the two end positions of twisting so that the reorientation of the threads between the creel and the cross reed is not required.

A further object of the invention is to provide a weaving device in which a cross reed and a warping reed are mounted for rotation by 180 in their mounting plane and guide means are arranged between the creel and the cross reed to guide the cone of threads into an areal field of threads having an extension of width which is at least V 3 approximately vertical to the extension of width of the field of threads in the cross reed.

A further object of the invention is to provide'a device for twisting a warp band which is simple in design, rugged in' construction and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularly in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

In the drawings:

FIG. 1 is -'a schematic side elevational view of the course of the threads from the beaming creel to warping cylinder in' the usual warping method;

FIG. 2 is a top view on the parts of FIG. 1 showing the course of threads between cross reed and the normal as well as twisted warping reed according to the usual method; 7

FIG. 3 is a top view on a warp beam with the warp rewound from warp cylinder and consisting of warp bands with symmetrical design structures;

FIG. 4 is a top view corresponding to FIG. 2 on a device on which the twisting of the warp band can be effected according to the invention;

FIG. 5a is a side perspective view of the device indicated in FIG. 4 indicating the course of the outermost threads of the warp band between beaming creel and warp cylinder;

FIG. 5b is a view similar to FIG. 5a in. which the course of the outermost threads with warp band are twisted in relation to that indicated in FIG. 5a; and

' that bands 12b and 120! are arranged mirror image-wise FIGS. 6a and 6b are detailed views of the courses of the threads immediately before the cross reed in both 7 its positions.

Referring to the drawings in particular the invention is applicable to machines of the type indicated in FIGS. 1 and 2.'The device includes a beaming creel with a schematically indicated number of creel bobbins 2. The thread 4 of each individual bobbin 2, still in the beaming creel, is drawn through a coordinated yarn brake 10 (FIG. 2) to impart an even tensioning of the thread. The thread 4 is then directed through a likewise coordinated thread regulator or broken-end detector which is connected for stopping a warping frame 9 in case of thread breakage.

The entirety ofthreads 4 dofied in one working step from beaming creel 1 is to form a warp band 12 which is to be wound up on the cylinder 8 of the warping frame 9 along its cone 13. The number of threads dotted from creel 1, however, only supplies one component of the warp band. Before the warp band can be wound up on cylinder 8, the entirety of theads must be formed into an approximately areal band of predetermined width.

' The set of the warp to be produced depends on the areal .bandtogether with the number of threads, as well as the succession of threads of different color, thickness or quality if the warp is to have a design v r The usual means in the traditional devices consist'of a cross reed 5,-a lease rod 6 and a warp reed 7, arranged in the indicated sequence between beaming creel 1 and warp cylinder 8. Purpose and operation of-these means are well known and are not further explained herein. 7

As mentioned before, in order to produce a whole warp on warp cylinder 8, several such bands 12 are wound up successively side by side on warp cylinder 8 and are subsequently simultaneously rewound on a warp beam. 'As an example, FIG. 3 shows a warp beam 14 whose warp generally designted 15 consists of four warp bands placed side by side, 12a, 12b, 12 and 12d. These bands have a design or pattern formed by a color stripe 16 at one border of each band. It is easy to recognize has in the guide reed 18 is turned in respect to bands 12a and 120. Therefore, when such warp is made, it is possibleafter warping the band 124 to twist the band by 180 and immediately warp the band 12b and after bringing the band to its original position, to warp the bandllc, which again corresponds to band 12a, and finally, after another twist of the band, to warp the band 12d. 7

In the past, the twisting of the band, in accordance with FIGS. 1 and 2 of the drawings which show a traditional arrangement, was effected by displacing the .warping reed 7 in its plane by 180 while the remaining draft was left unchanged. If, in FIG. 2, with the threads 4 shown drawn out to warp, for instance, the bands 12a and in FIG. 3, the warping reed 7 is displaced by in its plane in order to warp the band 12b and 12d. In warping each twisted band, the threads, shown in FIG. 2 in the upper half runnning through cross reed 5, are guided to the lower half of warping reed 7. The thread which in the cross reed was in dofiing direction at the extreme left passesthrough thewarping reed 7 to the extreme right and the outermost right thread in the cross reed passes through the warping reed as the outermost left thread, as shown in FIG. 2 in broken lines for threads 4a and 4b. 7

Thus, in warping the twisted bands in the narrow space between the cross reed 5 and warping reed 7, in

which, in addition, the lease rods 6 must find room, a

are doffed from the bobbins 2 in cree-l 1' and passed through yarn brake 10 and thread regulator or brokena end detector 3'. The threads 4' are directed between the creel 1' and the cross reed 5 into an areal field of threads,

in accordance with the invention. The thread field'is guided to provide an extension of width approximately vertically, while the field passes through the cross reed 5" in horizontal direction. This guiding of threads between creel 1' and cross reed 5 is effected by drawing the threads 4' from the creel at locations vertically above each other but in the same lateral succession and directing them through a guide reed 18, which is erected 'in the space between creel 1 and cross reed 5, preferably at a height where the center threads ,4 of the field in the guide reed 18 are on the level of the horizontal field of threads in cross reed 5'. To permit suchian arrangement, the guide reed 18 is preferably adjustable in height, as shown in FIGS. 5a, 5b, being slidable in a holder 20 and fixed in various heights bya clamping screw 21.

The introduction of the threads 4' coming from creel 1 intothe vertical guide reed 18 is facilitated'by two vertically extending guide rods 19' (FIG. 4) which are arranged in the dofling direction before the guide reed 18. The guiding of threads 4 from the cross reed Sf to a warp cylinder 8 through the warping reed is effected in traditionalmannerr The field of threads formed by the entire width of dotfed threads between the guide reed 18 and the cross reed 5' follows a plane F, conceivably produced by a rod combining at a point of equal length cote of each of the threads, which rod from its vertical position which it by 90 into a horizontal position while it is simultaneously advanced from. guide reed 18. to cross reed 5'. In FIG. 5a the course of the threads of the field of threads in this reorientation .is shown in perspective, and FIG. 6a shows the course of a number of threads of the field of threads, in particular,

between the guide reed 18 and the cross reed 5', as reflected in a plane. It is obvious that there is no crossing 7 of threads of the field of threads at any place.

When the warp band is to be twisted, not only the warping reed 7' but also, simultaneously with it and in equal direction, the cross reed 5 is displaced in its plane by 180, as is indicated by arrows. The sense of direction is selected such that between the two end positions the reorientation of the threads between guide reed 18 and cross reed 5 is nullified. The course of the threads after the twisting in this manner is shown in FIGS. 5b and 6b. The outermost thread of the field of threads, which in FIG. 5a, that is, before the twist, was running through the lowermost slot of the guide reed 18 and through the outermost slot at the right of cross reed 5, has been guided during the twisting below all other threads of the field of threads and after the twisting runs through the outermost slot at the left of the cross reed, as FIGS. 51) and 61) show. The plane formed after the twisting by the field of threads between guide reed 18 and cross reed 5 is absolutely congruent and symmetrical with the corresponding plane before the twisting and, again, is free from any crossing points between individual threads. The warping of the twisted band can be done under exactly the same working conditions as the warping of the band not twisted. The arrangement has the additional advantage that even with a twisted band between cross reed 5 and warping reed 7' the leasing can be done in the normal manner.

While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

What is claimed is:

1. A method for twisting a warp band which is doflled from a beaming creel and combined to a field of threads and directed through a cross reed and a warping reed to be wound up on the cylinder of a warping machine, comprising dofling the threads from the creel, combining the doifed threads between the creel and the cross reed by directing them into an areal field of threads having an extension of width approximately vertical to the direction of the extension of width forced upon the field by the cross reed, and turning the cross reed and the Warping reed by 180 in their plane, i.e. in a location where between the two end positions the reorientation of the threads between the creel and the cross reed is eliminated.

2. A method for twisting a warp band which is dotted from a beaming creel and combined to a field of threads and directed through a cross reed and a warping reed to be wound up on the cylinder of a warping machine, comprising dofiing the threads hour the creel, combining the doifed threads between the creel and the cross reed by directing them into an areal field of threads having an extension of width approximately vertical to the direction of the extension of width forced upon the field by the cross reed, and turning the cross reed and the Warping reed by 180 in their plane, i.e. in a location where between the two end positions the reorientation of the threads between the creel and the cross reed is eliminated, the threads dofied from the creel being guided through a path which is at a spaced location and vertical to the position of the cross reed in both its end positions.

3. In a weaving device comprising a creel bobbin having a plurality of bobbins for the dofiing of threads therefrom, a warp cylinder for winding up the threads, a cross reed and a warping reed arranged to guide the threads from the creel bobbin to the warping cylinder, said cross reed and warping reed being rotatable in their plane by about at least 180, and guide means between the creel bobbin and the cross reed for the threads which guide the cone of threads to form an areal field of threads having an extension of width with equal succession of threads which is at least approximately vertical to the extension of the field of threads in the cross reed.

4. In a weaving device comprising a creel bobbin having a plurality of bobbins for the dofiing of threads therefrom, a warp cylinder for winding up the threads, a cross reed and a warping reed arranged to guide the threads from the creel bobbin to the warping cylinder, said cross reed and Warping reed being rotatable in their plane by about at least 180, and guide means between the creel bobbin and the cross reed for the threads which guide the cone of threads to form an areal field of threads having an extension of width with equal succession of threads which is at least approximately vertical to the extension of the field of threads in the cross reed, said guide means being formed by a guide reed through which the threads pass in the same succession as through the cross reed but which is disposed at an angle of about in respect to said cross reed.

5. In a weaving device comprising a creel bobbin having a plurality of bobbins for the doffing of threads therefrom, a Warp cylinder for winding up the threads, a cross reed and a warping reed arranged to guide the threads from the creel bob-bin to the warping cylinder, said cross reed and warping reed being rotatable in their plane by about at least and guide means between the creel bobbin and the cross reed for the threads which guide the cone of threads to form an areal field of threads having an extension of width with equal succession of threads which is at least approximately vertical to the extension of the field of threads in the cross reed, said guide means being formed by a guide reed through which the threads pass in the same succession as through the cross reed but which is disposed at an angle of about 90 in respect to said cross reed, said guide reed being arranged at a height before the cross reed so that the center threads of the field of threads in the guide reed will be on the level of said cross reed.

6. In a weaving device comprising a creel bobbin having a plurality of bobbins for the dofiing of threads therefrom, a warp cylinder for winding up the threads, a cross reed and a warping reed arranged to guide the threads from the creel bobbin to the warping cylinder, said cross reed and warping reed being rotatable in their plane by about at least 180, and guide means between the creel bob-bin and the cross reed for the threads which guide the cone of threads to form an area-l field of threads having an extension of width with equal succession of threads which is at least approximately vertical to the extension of the field of threads in the cross reed, said guide means being formed by a guide reed through which the threads pass in the same succession as through the cross reed but which is disposed at an angle of about 90 in respect to said cross reed, means mounting said guide reed for adjustable positioning in respect to height and distance from said cross reed.

References Cited UNITED STATES PATENTS 2,176,710 10/ 1939 Goldsmith 2872.5 X 2,578,017 12/1951 Rovas 28-54 2,680,280 6/1954 White 2831 MERVIN STEIN, Primary Examiner.

L. K. RIMRODT, Assistant Examiner. 

3. IN A WEAVING DEVICE COMPRISING A CREEL BOBBIN HAVING A PLURALITY OF BOBBINS FOR THE DOFFING OF THREADS THEREFROM, A WARP CYLINDER FOR WINDING UP THE THREADS, A CROSS REED AND A WARPING REED ARRANGED TO GUIDE THE THREADS FROM THE CREEL BOBBIN TO THE WARPING CYLINDER,SAID CROSS REED AND WARPING REED BEING ROTATABLE IN THEIR PLANE BY ABOUT AT LEAST 180*, AND GUIDE MEANS BETWEEN THE CREEL BOBBIN AND THE CROSS REED FOR THE THREADS WHICH GUIDE THE CONE OF THREADS TO FORM AN AREAL FIELD OF THREADS HAVING AN EXTENSION OF WIDTH WITH EQUAL SUCCESSION OF THREADS WHICH IS AT LEAST APPROXIMATELY VERTICAL TO THE EXTENSION OF THE FIELD OF THREADS IN THE CROSS REED. 